check:      imm     0x22,0xf0
            and     0x21,0x08000002,0x22
            jz      toggle,0x21                 ;如果GPIO1是低电平就一直翻转GPIO0
            mov     0x08000001,0
            imm     0x20,10

delay:      djz     check,0x20                  ;延时函数，0x20里的值/10就是延时秒数
            j       delay

start:      imm     0x08000000,0x1              ;将GPIO0配置成输出模式，GPIO1默认为输入
            imm     0x20,10
            j       delay

toggle:     imm     0x22,0x0f
            xor     0x08000001,0x08000001,0x22  ;翻转GPIO0
            imm     0x20,10
            j       delay
